1. Check the rental contract: carefully check the rental contract signed between you and the landlord, especially the contents of the deposit refund and termination clauses. Know your legal rights and responsibilities.
2. Communicate with the landlord: If you are uncomfortable with the air-conditioning dust problem, you can communicate with the landlord to explain your situation and concerns. Ask them to solve problems, such as cleaning the air conditioner or improving the indoor environment. Discuss whether you can refund part of the deposit and put forward your reasonable requirements.
3. Dissolution through negotiation: If the air-conditioning dust problem cannot be solved and has a serious impact on your life, you can consider proposing to dissolve the contract through negotiation. According to the termination clause in the contract, determine the liquidated damages to be paid and return the remaining deposit through negotiation.
4. Seek legal aid: If you can't reach an agreement with the landlord or encounter other disputes, you can seek legal aid and professional legal advice. They can provide you with more specific guidance to help you safeguard your rights and interests.
In short, in the face of this situation, you should communicate with the landlord as soon as possible and find a suitable solution according to the rental contract and legal provisions. It is important to protect your own rights and comfort, while respecting the reasonable rights and interests of the landlord.